I designed this for the electro maker kits competition.

All design measurements fit the required dimensions.

The idea behind this was to create a simple, yet visually pleasing lamp design that could find a place on any desk, shelf, or nightstand. The design is generic in order to be agreeable to the maker regardless of personal interest. However, while this design is simple, it is very thoughtfully and cleverly designed to be both realistic, fantastical, and 3D printing optimized.  

The stem must be printed hollow with no top or bottom layers, but the mushroom top may be printed however you choose. Both do not need support.

The mushroom top was designed hollow to eliminate the need for zero infill or vase mode printing.

Because the spots on the top of the mushroom are thicker than the surrounding areas, it creates a cool light effect where the spots glow fainter.

Also, if the maker so chooses, they may paint the spots or surrounding areas a different color, but this is by no means required. 

Another cool feature of this design is the gills that are present on the underside of the mushroom. These gills allow for both a more realistic mushroom, and reduced light obstruction in the downward direction.

If you would like to build your own mood lamp with this design, here is the link to electro maker's awesome kit: https://www.electromaker.io/project/view/mood-lamp